The Brokeback Mountain and The Dark Knight star, who died of an accidental overdose in January 2008, was remembered by ex-girlfriend Naomi Watts on Wednesday, which would have been his 39th birthday. The Gypsy actress, 49, took to Instagram to recall the “darling heart” who once stole hers.

Watts, who dated the Australian actor for two years, from 2002 to 2004 (pre-Michelle Williams and Liev Schreiber), also posted a story with a throwback of them and labeled it “Beautiful Heath.”

On the 10th anniversary of his passing in January, an event that rocked Hollywood, she also paid tribute. Watts, who also grew up in Australia, called him a “beautiful soul” and a “true original,” adding that he always had his heart on his sleeve. “I will never forget his gentle spirit,” she shared.